664802041464 has 256 divisors, whose sum is σ = 2095441920000. Its totient is φ = 193465584000.

The previous prime is 664802041457. The next prime is 664802041469. The reversal of 664802041464 is 464140208466.

664802041464 is a `hidden beast` number, since 6 + 6 + 480 + 20 + 4 + 146 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664802041469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9614487 + ... + 9683385.

It is an arithmetic number, because the mean of its divisors is an integer number (8185320000).

Almost surely, 2^664802041464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664802041464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047720960000).

664802041464 is an abundant number, since it is smaller than the sum of its proper divisors (1430639878536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664802041464 is a wasteful number, since it uses less digits than its factorization.

664802041464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69087 (or 69077 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The spelling of 664802041464 in words is "six hundred sixty-four billion, eight hundred two million, forty-one thousand, four hundred sixty-four".